We did minority language at home and my children never had the phase of refusing to speak the minority language - I actually assumed that was because everyone spoke it at home, not just one parent. Several children close in age and they still speak to one another in the minority language - at nursery the teachers told me they spoke the community language all the time except if they quarreled with one another, when they switched to the home language! 🤣 They didn't know they did it though - when they were little they could never tell me which language they'd been speaking, they just spoke.
It definitely paid off - everything outside the home was in the community language and we made sure they mixed extensively with monolingual children from babyhood - parent and baby groups, toddlers groups, music groups, hours in the village playground - living in the countryside helped as they didn't know anyone else with the home language.
One child could pretty much simultaneously translate by age four but the others never could - linguistic skills don't come as easily to all children. The one who could translate so well speaks other languages too now, the others struggled when learning an actual "foreign" language - they have two native languages, and different siblings are stronger/ happier in either community or family language but all sound like native speakers in both.
Obviously for minority language at home you both have to speak the minority language to native speaker standard.
One parent one language works best if the primary caregiver is the minority language speaker (so if you live in the Netherlands you, if you live in the UK/ English speaking country their dad).
If the minority language parent doesn't speak the minority language to them enough it will never be as strong unless they move to the country at some point, but it's still useful to be able to talk to very old or very young members of that side of the family, to access that part of their heritage, and has various brain development benefits.